Hair brush



FIG. 1 is a top front perspective view of a hair brush, showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right-side elevation view thereof, the left-side elevation being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines shown in the drawings depict portions of the hair brush that form no part of the claimed design. 

CLAIM The ornamental design for a hair brush, as shown and described. 